Some Pekin Ducklings..........WANTED!!

Hi guys, my chicks are doing great. Like I wrote in my last thread I am looking for some Pekin ducklings. Currently there is someone around my area that only has some adults available; two hens and one male i think, but I dont know if I should take them or if I should buy some ducklings instead.
I have been told that it is better to get ducklings due to how they will be very tame with you and let you grab them compared to already adults(they are 4-5months old I think) that are afraid if they were not raised by you.
I was thinking about this and wanted to know some other things about them....

1. Would it be okay to add Pekin Ducklings with my chicks that I just received from Ideal Poultry?

2. If i would get adults, would they start laying eggs for consumption...Do they lay eggs for consumption most of the time?

3. Would they start breeding since they are about 4-5 months old already, or only in spring?

4. DOES ANYONE THAT LIVES IN THE ORLANDO, FL AREA HAVE ANY Day old-week old PEKIN DUCKLINGS!!!

Or Would like to order together once Ideal does have day old pekin ducklings since I wouldnt like to buy other/more poultry just to buy the day old pekins.
Would love to have some...........
Thanks very much!